To prepare the spiced filling:
A day before you plan to make the cigars, prepare the spiced filling.
In a small bowl, whisk together the Aleppo pepper cumin, black pepper, paprika, salt, turmeric, and cayenne. In a large skillet over medium heat, melt the butter. Add the shallot, garlic, and spice mixture, stirring to combine. Cook until soft and fragrant, for 3 to 5 minutes. Remove from the heat and let cool completely.
Crumble the 'Impossible Burger' into a large bowl and add the cooled butter mixture. Mix until well combined, then transfer to a food processor and process into a smooth paste.
Transfer to an airtight container and refrigerate overnight until well chilled.